This is my first attempt at pixeling (based on dixet_4). Please critique.
I like it, good palette and overall shape.
The pose looks a bit unnatural, even for a robot
I think it's the way the leg to the right bends.. It's like his leg is sliding towards the other and he's about to fall to the right.
For a stable pose I think the foot should point more towards the left and the leg shouldn't bend so much inwards.
Also, try adding some subtle rim highlights to the left on his "chest plate" to make it pop more.
And personally I also like to use slightly brighter outlines "inside" the sprite.
(couldn't resist playing around with the sprite)
2. Adjusted the pose
3. Rim highlights and softened the black outlines "within" the sprite.
EDIT: Oh sorry, I missed that the line-art was someone else's.
Oh well, my critique still applies.